a radioactive process in which an alpha particle is emitted from the nucleus of an atom, decreasing its atomic number by two.noun the radioactive decay process resulting in emission of alpha particles alpha decay The radioactive decay of an atomic nucleus by emission of an alpha particle (two protons bound to two neutrons). When an element undergoes alpha decay, its atomic number decreases by two.

noun the dominant female animal in a pack Examples The pack deferred to the alpha female. See alpha girl Word Origin fr alpha male Contemporary Examples ReasonTV interviews Kay Hymowitz about why the “alpha female” does not exist on a large scale in America. The Alpha Female’s Dilemma Ilana Glazer February 4, 2013 Most packs […]

a serum produced during pregnancy, useful in the prenatal diagnosis of multiple births or birth defects. Abbreviation: AFP. noun a protein that forms in the liver of the human fetus. Excessive quantities in the amniotic fluid and maternal blood may indicate spina bifida in the fetus; low levels may point to Down’s syndrome afp alpha-fetoprotein […]

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